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.\(N0.M0del 2Sheets.Sheet 1.

' J'. L. JOHNSON.

SMOKE CONSUMER.

No. 512.884. Patented Jan. 16, 1894.

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(No Model.)

J.,L. JOHNSON. SMOKE CONSUMER.

vN0. 512,884. Patented Jan. 16, 1894.

2 Sheets-Sheet 2.

W17 esses UNITED STATES.

PATENT JAMES L. JOHNSON, OF ST. LOUIS, MISSOURI, ASSIGNOR OF ONE-HALF TO LESLIE A. MOFFETT AND TOBIAS MITCHELL, OF SAME PLACE.

SMOKE-CONSUMER.

SPECIFICATION forming part of Letters Patent No. 512,884, dated January 16, 1894. Application filed August 5, 1893. Serial No. 482,479- (No model.)

To all whom iv may concern:

Be it known that I, JAMES L. JOHNSON, of the city of St. Louis, State of Missouri, have invented certain new and useful Improvements in Injector Smoke-Consumers, of which the following is a full, cleaiy and exact description, reference being had to the accompanying drawings, forming a part hereof.

My invention relates to an improvement in injector smoke consumers and consists in the novel arrangement, combination and construction of parts, as will be more fully hereinafter described and designated in the claims.

In the drawings: Figure 1 is a sectional side elevation showing my invention applied ready for practical use. Fig. 2 is alongitudinal central section of one of the jet tubes which I use in carrying out my invention. Fig. 3 is a similar 'view of a modification. Fig. 4 is an end elevation of Fig. 2. Fig. 51s a sectional plan view taken on the line 5-5 of Fig. 1.

l'indicates a steam boiler of common construction mounted in the usual side walls 2 and front wall 3 and provided with the usual smoke-pipe 4:.

5 indicates a bridge-wall which is located under the boiler a suitable distance in the rear of the front wall 3. Locatedin the usual manner between the bridgewall 5 and the front wall 3 is a grate 6.

7 indicates a steam dome connected to the top portion of the boiler 1 in the usual manner, and extending outward and downward from this dome is an ordinary steam-pipe 8 and connected to the downward end is a horizontal pipe 9 extendingacross the furnace at the rear of and parallel with the bridgewall 5.

10 indicates another steam-pipe of common construction, one end of which is connected to the vertical portion of the steam-pipe 8 and extending frontward parallel with the boiler and downward at the end of said boiler and its lower end connected to a longitudinal pipe 11 which extends acrossand parallel with the front wall. 1

Screwed in and connected to the pipe 11 is one or a series of jet tubes 12 extending in- Located in the upper edge of the bridgewall 5 and parallel with the pipe 9 is a series of pipes 14 extending through from the rear to the front of said bridge-wall which are screw-threaded on their inner peripheries to allow the main portion of the jet-tubes 12 to be screwed therein, the outer ends of' the said tubes being screwed into the pipe 9 for the purpose hereinafter mentioned.

Formed in the bridge-wall 5 and extending from a point under the grate is a series of air-passages 15, and these air passages extend upwardly from the center and open in the top of said bridge-wall each closely adjacent a jet opening. These passageways are enlarged around the pipes 14 and form an annular opening 16. These passageways are to allow circulation of air around the pipes 14 and the jet tubes 12 for the purpose of keep: ing them cool and preventing injury thereto by the intense heat during operation. The jet tubes 12 and 12 being exactly the same in construction I will proceed to describe but one of them. v

The jet tube 12 is constructed with a nut 17 formed on or fixed to its outer periphery a suitable distance from the fixed end. The other end 19 is rounded and provided with a narrow slit 20 which extends across said end and opens into a bore 21 which is formed longitudinally and centrally in'said tube, and terminates a distance from the end 19. The inner end of the narrow slot 20 intersects the longitudinal bore 21 of said jet tube at a point separatedsome distance from the end of said bore. screwed into a steam-pipe such as 9 or 11 and the steam forced through said pipe will force the steam out through the slot 20 and cause a thin horizontal flat jet of steam to be discharged and completely cover the fire-grate.

I can also apply my invention to a locomotive boiler by removing the required number The open end of the tube 12 is Y of stay-bolts and screwing the tubes therein. The tubes being constructed with screwthreads their entire length they can be readily applied and also act as stay-bolts.

The operation is as follows: When the fuel is placed on the grate in the combustion-chamber13 and when ignited by the operator the smoke will pass upward and be met by the jets of steam which are discharged from the jet tubes 12. The presumption is that the smoke will be consumed by the above means. The jets of steam discharged from the tube 12 are discharged downward and rearward and the jets of steam discharged from the tube 12 are discharged forward and above but parallel with the jet from the tube 12 for the purpose of more fully facilitatingthe operation. The narrow slits 20 act to spread laterally the jets of steam issuing therefrom.

What I claim isr 1. The combination with a steam-boiler, of a jet tube located at one side of the combustion chamber thereof to discharge ajet of steam rearwardly and downwardly of said chamber above the plane of the fire-grate thereof, an additional jet tube located at the opposite side of said combustion chamber to discharge a jet of steam forwardly and upwardly of said chamber in a direction opposite that in which said first mentioned jet is r to be discharged, and a steam pipe which connects each of said jets to the steam space of the boiler substantially as herein specified.

'2. The combination with a steam boiler of a bridge wall beneath said boiler, said bridge wall having formed therein a series of air passages 15, each having an enlargement 16 and a discharge opening adjacent the top of said bridge wall, a series of jet tubes, each having a longitudinal bore and its outer surface 40 screw-threaded continuously from a point adjacent each end, a threaded pipe-connection at one end of each jet-tube, a discharge nozzle at the opposite end of each jet-tube, a series of pipes 14, each having internal screw threads and located one in each of said enlargements 16 of said air passages, said jet tubes being threaded one into each of said pipes 14 and arranged to simultaneously discharge jets of steam into the combustion 5o chamber of the furnaceat points adjacent the discharge openings of said air passages, and a steam pipe which connects said series of jet tubes to the steam space of the boiler, substantially as herein specified.

In testimony whereof I affix my signature in presence of two witnesses.

JAMES L. JOHNSON.

Witnesses:

EDWARD E. LoNeAN, JNo. O. HIGDON. 

